Shortly after the end of the 2013 NFL Draft, the Detroit Lions signed free-agent safety Trevor Coston. Originally I thought Coston was one of their undrafted free agent signings, but he entered the NFL last year.
Actually, as it turns out, Coston joined the Chicago Bears around this time a year ago as an undrafted free agent. He remained with the Bears up until late August of last year. Given the timing of this signing, he's essentially another undrafted free agent for the Lions, but he at least has the experience of going through training camp once before.
Since the Lions didn't draft a safety this year, they now have eight on the team with the Coston signing. That number doesn't include any of this year's undrafted free agents who may be joining the Lions, as those moves aren't official yet.
Coston's odds of sticking around beyond the roster cuts in the summer aren't great considering there are so many other safeties already on the team. Glover Quin and Louis Delmas are the starters, and behind them is a collection of guys with experience (Don Carey, John Wendling, Amari Spievey, Ricardo Silva and Tyrell Johnson). There is going to be a battle for the final spots at safety, and Coston seems like a camp body more than anything.
UPDATE: It turns out Coston was merely invited to the Lions' rookie minicamp as a tryout.